variable-certainty-null-assign.php

<?php // lint >= 7.4

function (): void {
	$scalar = 3;

	echo $scalar ??= 4;

	echo $doesNotExist ??= 0;
};

function (?string $a): void {
	if (!is_string($a)) {
		echo $a ??= 'foo';
	}
};